Start line numbering at 1 when acting on entire file

When acting on the entire file, line numbering should start at 1 for consistency with other programs and usage of act on partial files.

Here's an example of the bug (see line 7):

![screen shot 2014-04-04 at 2 41 43 pm](https://cloud.githubusercontent.com/assets/6197/2620663/17c85bc2-bc42-11e3-95cd-a02f6f18297f.png)